基于摇摆中间柱型阻尼器的建筑结构变形分散控制研究

Displacement dispersion control for building structures using rotational stud-type dampers

摘要

地震作用下建筑结构变形在特定层集中容易引起局部构件严重损伤甚至结构整体倒塌，控制结构变形均匀分布对提升结构整体抗震性能有重要意义。本文提出通过摇摆中间柱连接相邻层阻尼器，形成以层间变形差为控制目标的相邻层联动的减震结构系统。推导了阻尼器变形与层间变形差的关系，建立了减震结构系统的动力方程。开展了摇摆中间柱控制结构的振动台试验，验证了被控结构的力学性能。基于10层结构模型开展动力弹塑性响应分析，分析了阻尼器刚度对减震性能的影响。结果表明，摇摆中间柱型阻尼器在发挥消能作用的同时，可以调节结构各层的水平力分布，有效降低结构变形集中程度，达到了层间变形分散控制和消能减震的双重效果。

Abstract

The concentration of inter-story deformation is one of the key factors leading to severe damage or even collapse of building structures during earthquakes. Controlling structural deformation and ensuring uniform distribution of deformation are important objectives in seismic design. This paper proposes a rotatable stud-type damper for controlling structural earthquake response, where adjacent stud columns are connected and hinged on each floor, forming a structural system with linked dampers between adjacent stories to reduce the deformation difference between adjacent stories. The relationship between damper deformation and inter-story displacement is theoretically derived, and the dynamic equation of the controlled structural system is established. The shaking table tests are conducted on both uncontrolled structures and the rotatable stud-type dampers to check the feasibility. The elasto-plastic earthquake response analyses are conducted on a ten-story building model with rotational stud-type dampers added. The results show that the rotatable stud-type dampers can effectively adjust the story shear force distribution, adjust the deformation mode, and prevent weak story failure caused by concentrated story deformation. Additionally, the dampers also provide an energy dissipation effect, achieving the dual effects of coordinated inter-story deformation and energy dissipation.

关键词

摇摆中间柱型阻尼器 / 变形分散控制 / 变形集中 / 减震控制

Key words

rotational stud-type damper / displacement dispersion control / displacement concentration / seismic control

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基金资助

国家自然科学基金项目(52178504)